Although the pair were previously friends, Stewart criticised Trump for not stepping out of the spotlight when she signed on for a spin-off show based on the businessman's hit reality TV series The Apprentice and a war of words ensued.

Now, the lifestyle expert has hit out at Trump once again.

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During an appearance on Access Hollywood the star warned: "Donald is out of control. By the time he's finished, he will have fired everyone around him and there will be nobody left. And poor Donald will be sitting there on his little pedestal all by himself. He needs to be careful!"